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Flywheel / Clutch Mix 'n' Match...
scootz - 25/1/12 at 05:51 PM

I have a Rover engine and a Mazda gearbox which I would like to run together.

What would be the most cost effective way to approach the union!?

Would it simply be to get a custom flywheel made that fits the Rover crankshaft bolt-pattern and the Mazda pressure-plate bolt pattern? And if so, can anyone recommend a suitable fabricator???

Thanks in advance.

Scotty

snapper - 25/1/12 at 06:17 PM

Parts bin raid
Rover flywheel
Rover clutch cover/ pressure plate
Mazda clutch (driven) plate
Your looking for one with the right diameter to fit rover cover
Clutch release bearing will need some thought

big_wasa - 25/1/12 at 06:50 PM

Will the kv6 fly' fit in the mazda bell housing ? or are you going for this sort of setup but using the mazda girbox instead of the T9 ?

http://photos1.blogger.com/x/blogger/5605/3181/320/74819/IMG_0819.jpg

There is a firm that makes light weight flywheels for the kv6.




Ive just bought a little toy for my kv6

pic

scootz - 25/1/12 at 06:58 PM

I was going to modify the bellhousing of a KV6 fwd boxes, but now that I've split the box I can see that it's not really going to work.

Soooooo... I'll probably look to make an adapter-ring for the Mazda bellhousing.

liam.mccaffrey - 25/1/12 at 07:03 PM

Parts bin raid it the only manly way use the rover flywheel and pressure plate, then go through the QH (or whichever) catalogue looking for a friction plate with the correct dimensions and mazda splines.

scootz - 25/1/12 at 07:04 PM

Fair enough!!!

I'll man-up and get browsing!

scootz - 25/1/12 at 07:47 PM

The standard Rover clutch kit it 228mm... ACT do an 225mm RX7 friction-plate.

Close enough???

owelly - 25/1/12 at 08:06 PM

What type of splines? Escort td is 229mm x ford 1"x23 splines iirc. And some Mazda use the same input shaft.
I got a custom friction plate built for me for £25 from CG Motorsport in Leeds, or send them your friction plate and get them to put a Mazda spline in it.

[Edited on 25/1/12 by owelly]

owelly - 25/1/12 at 08:12 PM

A quick google has the Mazda input shaft at 15/16"x20 splines. Is this what you have?

ETA, you'll lose a large portion of the surface area by losing a few mm off the o/d so aim for the max that will fit.

[Edited on 25/1/12 by owelly]

scootz - 25/1/12 at 08:35 PM

Thanks for that!

Didn't realise that I could have a friction plate built with the necessary spline. Will look into it tomorrow.

britishtrident - 25/1/12 at 08:45 PM

Officially you can usually use a driven (friction) plate up 1/2" smaller than the nominal pressure (cover) plate diameter, for example an 8" plate with an 8"/8.5" cover.

owelly - 25/1/12 at 09:29 PM

You could use a 4" plate in a 13" cover if you wanted but as I said, if you do the maths, you're losing a lot of surface!

britishtrident - 25/1/12 at 09:52 PM

quote:
Originally posted by owelly
You could use a 4" plate in a 13" cover if you wanted but as I said, if you do the maths, you're losing a lot of surface!



Thats the way clutches were sold for example a Borg & Beck clutch cover would be catalogued as 8"/8".5 The thing to watch is the inside diameter of the friction lining isn't smaller than the inside dia of the pressure plate friction surface.